Intermittently-operating torque-transmitting mechanism



R. L. LOOMIS 1,742,918 INTERMITTENTLY OPERATING TORQUE TRANSMITTINGMECHANISM Jan. 7, 1930.

Filed March 18, 1929 Patented Jan. 7, 1930 RALPH L. LOOMIS, OF BEDFORD,MASSACHUSETTS INTERMI'ITENTLY-OPERATING TORQUE-TRANSMITTING MECHANISMApplication filed March 18, 1929. Serial No. 347,829.

This invention relates to mechanism for intermittently transmittingtorque from a motor to a feed roll which may be a member of a pair ofrolls, the nip of which engages sheet or other material to progressivelyfeed the same.

An object of the invention is to provide an improved torque-transmittingmechanism adapted to alternately impart to the rolls a feeding movementof predetermined amplitude, and prevent such feeding movement for apredetermined period.

Another object is to cause, for a purpose hereinafter stated, a slightreverse movement of the feed roll while its feeding movement isprevented.

Another object is to enable the amplitude of the feeding movement of theroll to be conveniently varied.

10 Of the accompanying drawings forming a part of this specification,-

Figure 1 is a side view of my improved feeding mechanism associated witha pair of feed rolls adapted to feed sheet materiahand means for actingon said material when it is at rest, said means being, in this instance,adapted to sever the material, the feeding mechanism being shown as itappears when imparting a feeding movement to the feed rolls.

Figure 2 is a view similar to Figure 1, showing the mechanism as itappears when the feeding movement is arrested.

Figure 3 is a view similar to Figure 2, illustrating the slight reversemovement of the feed rolls.

Figure 1 is a section on line 1- 1 of Figure 1.

Figure '5 is a section on line 55 of Figure 1.

Figure 6 is a section on line 66 of Figure 5.

The same reference characters indicate the same parts in all of thefigures.

My improved mechanism is adapted to intermittently transmit torque froma source of power such as an electric motor, to a feed roll 13, whichmay be a member of a pair of coacting feed rolls 13 and 14, adapted, inthis instance, to feed sheet material 15,. such as paper, engaged by thenip of the rolls. The the roll 13 is Journaled in fixed shaft 16 ofbearings 17 one of which is shown by Figure 4. The shaft 18 of the roll14: may be vertically movable in a bearing 19, and held down by springs20,

one of which is shown by Figure 1. Said bearings may be supported by anysuitable frame work, designated in part by 21.

Figures 1, 2 and 3 show means for acting on the material 15, when thelatter is at rest,

said means including, in this instance, a reciprocating severing blade22, and a fixed. blade 23, cooperating therewith. The acting means maybe, however, otherwise embodied and adapted to otherwise act on thematerial 15,.for example, to emboss or otherwise ornament the material,with or without severing it, the action on the material occurring whenthe latter is at rest.

When the feed rolls are organized as above described, the roll 18 themechanism next being rotated by frictional contact with the,

is positively rotated by described, the roll 14 material 15, when theroll 13 rotated.

26 designates a continuously driven primary gear whose shaft 27, shownby dotted lines in Figure 1, is journaled in a fixed bearing in astandard 28. The primary gear 26 may be driven by a motor connecteddirectly to its shaft 27 I prefer, however, to drive the primary gear bya motor shaft 12, having a relatively small gear 25 meshing with theprimary gear. 29 designates an orbital gear, so called because itrevolves in an orbit around the axis of the primary gear 26, withoutrotating on its own center, so that its motion is not planetary. Theorbital gear is fixed eccentrically to the primary gear 26 by holdingmeans, preferably embodied as best shown by Figure 5, and hereinafterdescribed,

said holding means preventing rotation of' the gear 29 on its own centerand maintaining the said center at one side of the axis of the primarygear 26.

3O designates a shiftable secondary gear meshing with the orbital gear29 and with a gear 31, fixed by a key 32 (Figure 4) to the feed-rollshaft 16.

A jointed connecti on is provided between Itation ofitheseconrlarygear3Q,-and the feed- 3. hif l e slofl38x tendin the shaft 16 and the centerof the orbital gear 29. Said connection includes an arm 33. preferablymade in two parts, as shown by Figure 4, adapted to oscillate on theshaft 16, and a link 34 connected at one end by a pivot stud or bolt 35,with the swinging end of the arm 33, and at the other end with thecenter of the k rhitaligha' i' .29, as late). Said connectionmaintaiiisthe seam ary g'ear in engagement with the orbital gearand the feed-rollgear andzpermitsithe Secondarygear i to be oscillated by the orbitalmovement of the g V V h v The orbital gear is preferably radiallyadjustable toward and from the axrs sf theprie y gea 2 to P r eliietionzof he .dia eter ,of Regina, and wrm pqpq p variatib 'spfnre ampumueiocf'fee d nghiove- ,mlntof the feedjrollBL Tothis e dQIattach to, theprimar gar, as by 37, ta -guide "e anyfae e win y gear Sheff "A i e 5 9n ev l i the l t as e me, Q a laterall pro ecting and 40, enteringthie111110 of th o bital g a 9 and fi li t b e -I ii imi1 'ylei iw a l l l jS1 1? *& 11 e y h i d die -@1 of'the orbital gear center from tl eaxjis,of the primar g'ea'r 2 6,, and thereby vary the amplitude o a awedmwema 'QfJm re1- T hold theslide 29in anyposition towhichit 3 3' b aduste 'pm id e i s evsZ engaged with tapped orifices in the vgiiide36,and bearing on theen ds of the-slide, The pivotal 'c'onnec'tionbetweenthe oscillatory arm 33 and thelink 34 ii also adjiustable, the linkbeing proyided with a 51% 43,111 which the pivot stud or bolt 35 islaterally movable, Said bolt being provided with a confining nut 44. i

The continuous movement of the primary gear 26'and .of the orbital gearis in the direction indicated by arrow as in Figures '1, 2 and 3, andpauses continuous changes of the relatio s of t e m ng-Pa t ea h heSeveiial' different relations areillustrated by F1gures 1, 221ml 3. Whensaid parts are in any relat on to each other except the relaionsh byigures 2 an 3, h secon a' y gear rotated in the forwarddirectionini t yrow and e esp ndi glvr etes h fee r01 Wh n he p t a e elated as {shownby Figure 2, showing iwhatI ll he de cen e la n, t e w ingmovement ofthe feed ,rollicease briefly u il the Pa ts are el ted es, h wn by1111e3- v 1 Du ng the m ement o t-he p 't r m Figure 2 to Figure 3relation, the secondary gear 30 is brieflyrotated back-ward, asindicated by arrow zin Figure 3, and briefly rotates the feed'rollbackwardfthe object being to slightly withdraw the forward end ofthe material 15 from the-path ofthe acting member 22, as shown by Figure3, said member being a reciprocating cutter. This withdrawal is veryslight, and prevents the forward end of the material from being liftedby frictional contact with the knife when the latter is rising. Thebackward rotation of the secondary gear and the feed roll ceases, andforward-rotation thereof is resumed, after the brief backward rotationof the secondary gear and the feed roll.

It will now be 'senthat during the major port n of a omplete rotat ee..o the P mary gear, a feeding movement is imparted to thefeed roll, andthat during a minor portiono'f said rotation a feeding movement of thefeed roll is prevented anda backwardrotation of the feed roll is The orba e r 2. t l k 4, nd. t oscilla s rmBO; nsfifuteee e m od atpresentknowjnby me of ,a connection between a continuously driven prim y gear na e nda y eng e v ith ex ed leid Qen ibn'bei ee e t i pa a 'i e e vem no' he ceiide y e and 'thefeed roll during the majior riportion of acomplete rotation of ,thelprim ary gear, and to prevent saidfeedingmovement during a minor portion of sai d complete rotation.

vI cl i Intermittently acting torquegtransmitting mechanism comprisingacontinuonsly driven primary-gear, a .secondarygear ened e w h fee to rote th same, a orbital gear, holding means fixed tothe primary andorbital "gears, and holding the orbital gear in an eccentric position,on the primary gear, so that theorbital gear is revolved about he axisofthe prirnary gear without rotation on its own center, a shiftablesecondary gear meshing with the orbital gear and'engagedwith a feed rollto rotate the latter, and a jointed connectionbetween the center of theorbital gear, the axis of the secondary gear and the-axis of the feedroll, whereby the secondary gear is maintained-in engagement with theorbital-gear, and with the feed roll, andpermi tted to oscillate whilerotating, saidv connection inclndin'gan arm oscillatable on thefeed'roll axis, and ailink ,pivotally connected to the swinging efnd ofsaid arm and to the said holding means, the arrangement being suchthatthe orbital gear, in moving through the major portion'of'its orbit,-rotates the-secondary'gear to cause a feeding movement of the feed roll,and when movingthro. ug h a minor holding "means being adjustable :tovarythe radial distance o'f-theorbital gear centei' rfrom the axis. Ofthe primary igear, and thereby-' signature.

RALPH L. LOOMIS.

